Greetings, and welcome to the Clearside Biomedical First Quarter Financial Results and Corporate Update Conference Call. As a reminder, this conference call is being recorded. I’d now like to introduce your host, Ms. Jenny Kobin, Clearside Investor Relations. Ma'am, please go ahead..

Good afternoon, everyone, and thank you for joining us on the call today. Before we begin, I would like to remind you that during today's call, we will be making certain forward-looking statements.

Various remarks that we make during this call about the Company's future expectations, plans and prospects constitute forward-looking statements for purposes of the Private Securities Litigation Reform Act of 1995.

Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors, including those discussed in the Risk Factors section of our annual report on Form 10-K for the year ended December 31, 2020, and our other SEC filings available on our website.

In addition, any forward-looking statements represent our views as of today and should not be relied upon as representing our views as of any subsequent date. While we may elect to update these forward-looking statements in the future, we specifically disclaim any obligation to do so even if our views change.

On today's call, we have George Lasezkay, our Chief Executive Officer; Dr. Thomas Ciulla, our Chief Medical Officer and Chief Development Officer; and Charlie Deignan, our Chief Financial Officer. After our formal remarks, we will open the call for your questions. I would now like to turn the call over to George..

First, XIPERE approval would represent Clearside's first commercial product approval. Second, it would be the first drug approved for delivery into the suprachoroidal space, which is behind the patient's visual field.

This innovative approach to ophthalmic drug delivery could be a major breakthrough for the treatment of retinal diseases as it demonstrates the potential for a reliable, non-surgical, office-based method to deliver a variety of therapeutic products for a broad range of back of the eye diseases.

Our team has worked tirelessly throughout the XIPERE NDA resubmission process, and I would like to publicly recognize their efforts. They successfully accomplished the technology transferred to our new manufacturing partner in an incredibly short period of time.

The efficiency of this transfer process is a testament to the hard work, cooperation and professionalism of both the Clearside team and the team at our new contract manufacturer. The XIPERE NDA resubmission is a full and complete response to all of the items identified in the complete response letter we received from the FDA in October, 2019.

We anticipate FDA acceptance of the resubmission of the NDA within approximately 30 days of its submission date and we believe this application will be considered a Class 2 resubmission, with a targeted six-month review timeline under the Prescription Drug User Fee Act. We will provide an update when we receive our assigned PDUFA date.

The potential approval of XIPERE will further validate our suprachoroidal injection platform and its utility in delivering small molecule suspensions into the suprachoroidal space. For the commercialization of XIPERE, we have two outstanding global partners, Bausch + Lomb and Arctic Vision.

Bausch Health and Bausch + Lomb, its leading global eye health business has the exclusive license for commercialization and development of XIPERE in the United States and Canada as well exclusive options for the European Union, United Kingdom and other territories.

We have maintained an ongoing dialogue with Bausch Health and Bausch + Lomb as we prepare the XIPERE NDA resubmission, and they provided input and support in connection with the filing.

Our medical affairs, supply chain and clinical teams have also worked closely with Bausch Health and Bausch + Lomb as they prepare for the commercial launch of XIPERE in the U.S. once approved. In Asia, Arctic Vision has the exclusive license for the commercialization and development of XIPERE in Greater China and South Korea.

They announced in December that they obtained approval from the Chinese regulatory authority for their investigational new drug application in uveitic macular edema. They currently expect to begin Phase III clinical trials in that indication later this year.

The second small molecule suspension for suprachoroidal delivery in our internal pipeline is CLS-AX, our proprietary suspension of the tyrosine kinase inhibitor, axitinib.

We are excited about this program because we believe that CLS-AX may improve the treatment of neovascular age-related macular degeneration, commonly known as wet AMD, through potentially improved safety and efficacy and by reducing the frequency of patient injections with this prolonged durability.

CLS-AX is currently being evaluated in a U.S.-based Phase I/IIa clinical trial entitled OASIS. It is a multi-center, open-label study to evaluate safety and tolerability of escalating single doses of CLS-AX in wet AMD patients.

We have completed patient dosing in cohort 1, and we expect to announce cohort 1 results by the end of June after the last patient visit and data analysis. I'll now turn over the call to Dr. Tom Ciulla, our Chief Medical Officer and Chief Development Officer to elaborate on CLS-AX, our partnered programs and recent data presentations.

Tom?.

Thank you, George. Our clinical and development teams are extremely excited about the milestone we achieved with the resubmission of our XIPERE NDA. We look forward to our first potential product approval and further validation of the benefits of our suprachoroidal injection platform.

We are also pleased with the progress we have made with CLS-AX, our lead development asset. As George mentioned, the CLS-AX Phase I/II OASIS clinical trial is a U.S.-based single-dose escalation clinical trial consisting of three cohorts.

The primary endpoint for the trial will assess the safety and tolerability of CLS-AX for three months following its administration. Secondary endpoints will evaluate the pharmacokinetics, visual function, ocular anatomy, and the need for additional treatment with intravitreal aflibercept.

As we reported in March, we completed enrollment of cohort 1 on schedule. Our primary objective for cohort 1 is to establish a floor for safety in this first in-human trial using a low dose of 0.03 milligrams of CLS-AX as we are committed to proceeding prudently in developing a safe and well-tolerated treatment.

We expect to announce data from cohort 1 by the end of June. Following that announcement, we then expect to begin recruiting patients in cohort 2. Late last year, as part of our overall regulatory strategy, we submitted a plan to the FDA to study a broader range of doses in OASIS.

Based on our preclinical data, the FDA and our institutional review board recently accepted this approach. Consequently, we plan to increase our CLS-AX cohort 2 dosing from 0.06 milligrams to 0.1 milligram, which was our originally planned cohort 3 dose.

Overall, we are pleased with the trajectory of this trial to date, and we believe CLS-AX will be attractively differentiated combining the potential benefits of pan-VEGF inhibition with compartmentalized safety of suprachoroidal administration.

Ultimately, we believe that CLS-AX may improve the overall patient experience with a more durable treatment in a favorable tolerability profile.

With respect to our preclinical initiatives, we continue to advance our integrin inhibitor program, with the focus on diabetic macular edema and macular degeneration where specific integrins have been implicated in these diseases.

Similar to what we have demonstrated with our other small molecule suspensions, axitinib and triamcinolone, we believe our suprachoroidal delivery approach of an integrin inhibitor could provide targeting, compartmentalization and durability advantages over other delivery approaches.

We are currently running preclinical studies with our integrin inhibitor suspension, and we expect to conclude these studies later this year. Our clinical development partners also continue to advance their programs utilizing our SCS Microinjector to deliver their agents.

REGENXBIO is currently conducting two Phase II clinical trials evaluating the efficacy, safety and tolerability of suprachoroidal delivery of their gene therapy agent RGX-314. The first trial entitled AAVIATE is targeting the treatment of patients with severe wet AMD who are responsive to anti-VEGF treatment.

On their Q1 earnings call, REGENXBIO reported meaningful advancements on this trial and provided three key updates regarding suprachoroidal delivery of gene therapy. First, they expect to report interim data from cohort 1 in the third quarter of this year.

Second, they have completed dosing of patients in cohort 2 and expect to report interim data in the second half of 2021, and third, they have expanded the patient population for AAVIATE and have begun dosing a third cohort in patients who are positive for neutralizing antibodies.

As a reminder, based on the protocol, patients are not receiving corticosteroids before or after administration of RGX-314. Thus, the continued progress in this trial without immunosuppressive therapy is very encouraging. The second RGX-314 clinical trial is a Phase II trial for the treatment of diabetic retinopathy entitled ALTITUDE.

REGENXBIO continued to enroll patients in cohort 1 and expect to report initial data later this year. These REGENXBIO programs highlight the opportunity for an in-office suprachoroidally administered gene therapy. We are also excited about the recent new data from our oncology partner, Aura Biosciences.

They are currently running a Phase II clinical trial evaluating their lead asset AU-011 delivered via our SCS Microinjector into the suprachoroidal space.

AU-011 is a first-in-class virus-like drug conjugate therapy in development for the first-line treatment of choroidal melanoma a rare and aggressive form of eye cancer that is the most common interlocutor cancer in adults. Recently, Aura has published promising preclinical data on AU-011.

In April, data was published in the peer-reviewed medical journal Cancer Immunology Research, a journal of the American Association for Cancer Research reinforcing the therapeutic advantage of their virus-like drug conjugate in treating cancer compared to other available treatments.

In addition, at the recent ARVO conference, Aura presented promising data comparing the ocular distribution and exposure of AU-011 with both intravitreal and suprachoroidal administration in a rabbit model of human uveal melanoma.

After suprachoroidal administration, negligible levels of AU-011 were observed in the vitreous, while there were high exposure levels in the tumor and choroid-retina. In addition, when comparing suprachoroidal to intravitreal administration, the exposure of AU-011 in the tumor was approximately 5x higher when AU-011 was injected suprachoroidally.

These data suggests that suprachoroidal administration may have certain advantages compared to intravitreal administration, including superior tumor distribution, higher tumor bioavailability and less unintended exposure in the vitreous and other key ocular structures.

We are extremely encouraged by this preclinical data and look forward to the continued progress from Aura on their Phase II clinical trial. We have also been active among the retina physician community. We are pleased to have Clearside featured in several recent key industry events.

At the Wet AMD & DME Drug Development Summit, we participated in panel discussions entitled Ending the Burden of Monthly Treatments and Making Strides Forward in Drug Delivery & Dosing. We also presented suprachoroidal drug delivery of CLS-AX as a potential solution for treatment burden in patients with wet AMD.

During the Investing in Cures Summit 2021 organized by the Foundation Fighting Blindness and its RD Fund, we are honored to have the opportunity to present our corporate profile. At the recent ARVO 2021 Annual Meeting, we have multiple posters and presentations.

These presentations highlighted the benefits of suprachoroidal delivery in multiple settings and diseases. There are several key posters I'd like to mention from these data presentations. First, Dr. Allen Ho presented a multimodal imaging study on suprachoroidal injections across species.

This project compared suprachoroidal injections to intravitreal injections using diagnostic imaging and demonstrated the uniquely differentiating compartmentalization and targeting of suprachoroidal drug delivery. Dr.

Sumit Sharma presented on safety results of the suprachoroidal injection procedure across three retinal disorders in our clinical trial programs. This poster demonstrated that in humans the safety profile of suprachoroidal injections is broadly comparable to intravitreal injections.

Our team also presented a poster on the ongoing suprachoroidal injection procedure training we've been running with physicians during COVID-19. This training program is becoming increasingly important as we advance our CLS-AX trials and prepare for the potential U.S. approval of XIPERE.

Importantly, physicians who completed virtual or in-person training felt highly confident in their ability to perform the procedure in patients in the future. In addition, Dr.

Viral Kansara presented a poster where he showed that suprachoroidally delivered DNA nanoparticles containing the human Myo7 transgene produced durable levels of human Myo7A protein in the RPE and choroid.

These data demonstrate that suprachoroidal delivery has potential as an office-based, repeatable therapy for retinal disorders caused by defects in genes too large to fit into an AAV vector approach. Links to these publications and presentations are available on our website in the science section.

In closing, we've had a productive start for 2021, and we look forward to continued progress as we advance our clinical and preclinical development programs. I will now turn the call over to our CFO, Charlie Deignan to review our financial results.

Charlie?.

Thank you, Tom. Our financial results for the first quarter were published this afternoon in our press release and are available on our website. Therefore, I will summarize our current financial status. Our cash and cash equivalents as of March 31, 2021, totaled approximately $26 million.

This includes approximately $14.4 million in aggregate net proceeds from our registered direct offering and use of our ATM facilities in January. Our quarterly cash burn is primarily due to work on the activities related to getting XIPERE approved in our CLS-AX program. Investments in our pipeline are also incorporated into our operating plans.

Based on our current funding and planned spending, we expect to have sufficient resources to fund their operations into the first quarter of 2022. Importantly, this estimate does not include milestone payments we may receive under our current partnership agreement.

If XIPERE approved, we expect to receive up to $15 million from Bausch + Lomb, an approval and pre-launch milestones. In addition, we would receive a milestone payment from Arctic Vision of $4 million. Thus, we are on track to receive nearly $20 million of non-dilutive funding before the end of this year.

We appreciate the interest and support from our shareholders and the broader investment community, and we look forward to participating in the upcoming JMP and Raymond James Investor Conferences next month. I will now turn the call back over to George for his closing remarks..

Thanks, Charlie. We are optimistic as we look forward to reporting data next month from our OASIS trial and to the potential XIPERE U.S. marketing approval later this year. There are currently four ongoing clinical trials with three novel product candidates administered into the suprachoroidal space using our proprietary SCS Microinjector.

Our extensive clinical experience with more than 1,200 injections reinforces our belief that the SCS Microinjector has the potential to be a reliable, non-surgical, office-based method to access the suprachoroidal space for the treatment of a broad range of back of the eye diseases.

We at Clearside remained dedicated to making a difference for people suffering from potentially blinding diseases and we look forward to keeping you updated on our progress as the year unfolds. I would now like to ask the operator to open the call up for questions..

[Operator Instructions] Your first question is from Dr. Zegbeh Jallah from ROTH Capital Partners. Your line is open..

Hi, guys. Thanks for taking my question. Just have a couple of quick ones. Yes, I think the first one is just about the upcoming Phase I/II study. Just want to clarify the patients that are being enrolled. Are they anti-VEGF responders or non-responders? And I know, the focus is safety, but just wanted to get a sense of the patient..

Tom, do you want to take that question?.

Sure. So patients to be eligible in the trial had to have been treatment experience. They had to have had two prior injections within the four months proceeding screening. They received flipper set injection on screening and then a CLS-AX injection a month later. They have to have active exudation based on a masked reading center assessment.

So I would categorize these patients as VEGF dependent..

Okay. Perfect. And then just to follow-up here, I know at ARVO you presented some information on your virtual training procedures, and just kind of wanted to get some more details on that.

And then to get a sense of how you expect that to perhaps influence your ability to actually train more physicians for future studies?.

That's a great question. We have a very robust training program or medical science liaisons, our biomedical engineers who have helped with the validation of the original injector, and they in conjunction with the medical affairs team has designed a very robust training program. We have an artificial eye where physicians can practice.

And during COVID-19, obviously with travel restricted, we actually developed a virtual training program, it’s a very clever program where we will ship out this artificial eye to the physician and able to actually do live training over the Internet.

We then as part of this [project representatives of IRB] looked at some metrics with respect to the training and physicians were overall quite pleased with both the virtual and in-person training, and in – and both the virtual and in-person training felt quite well trained in order to be able to deliver investigational products for suprachoroidally in the future..

Thanks, Tom. Looking forward to more updates on the program including the data coming up, and congrats to the team on the NDA for XIPERE..

Thanks, Zegbeh. Appreciate it..

Your next question is from Annabel Samimy from Stifel. Your line is open..

Hi, guys. Thanks for taking my question and congratulations on the progress. I had a couple of questions. I guess, first on OASIS.

I just wanted to understand, are you skipping an actual dose and going straight into the one milligram for that second cohort? Or is there going to be any additional dosing cohorts after that certainly looking to go higher? And then are you – beyond the three months, are you looking for durability data beyond that? I'm just trying to understand what your intention is of this dose escalation trial.

And just have another follow-up. Thanks..

Okay. Tom, do you want to go ahead with….

Sure. Let me talk a little bit about the dosing and the changes we've made. As I mentioned in the prepared remarks, we approach the FDA and the IRB ultimately because we wanted a broader range of dosing and more flexibility. So cohort 1 was unaffected with 0.03 milligram dose.

Cohort 2 is now the 0.1 milligram dose, which was our originally proposed cohort 3. And then for cohort 3, we plan to go to 0.3 milligrams..

Sorry.

To that you're going to which one?.

To 0.3. So the dosing will range from 0.03 to 0.3. So potentially tenfold [indiscernible]. And, of course, this will all be contingent on cohort 2 results and reviewed by the safety monitoring committee. But that's the current plan. So in essence, we are skipping over the 0.06 milligram.

So we're going – instead of going from a twofold increase over cohort 1, we're going to a threefold increase over cohort 1..

Okay.

And are you looking for greater durability data in terms of three months?.

Sure. Yes. So with respect to the second question, as we said before, the cohort 1 dose is really to establish a floor of safety. It's a low dose and we want to proceed prudently in escalating these doses. So we don't expect robust signs of biologic efficacy from cohort 1.

And ultimately as we escalate, we plan to establish an extension study where we follow the patients for an additional three months beyond the originally planned three months. So we will be looking for durability as we escalate the dose..

Okay. And then I have one other question on the – I guess, the REGENXBIO, and I'm thinking more conceptually, I guess, historically there've been some serious immune responses to the delivery of viral vectors for gene therapy.

As upside being a surge [indiscernible] moving to the SCS space, are there benefits to delivering the gene therapy suprachoroidally in terms of an immune response? Is there anything you can help us understand about that? Thanks..

That’s a great question. So it's really a two-part question. So number one, what are the potential benefits of suprachoroidal delivery over a subretinal surgical delivery of gene therapy? And as you mentioned, obviously we avoid the surgical risks of vitrectomy in general.

We also avoid the risk of creating a retinotomy or a hole in the retina through which the gene therapy is injected. And we also avoid the risks of creating a bleb or subretinal – during the subretinal injection, you’re literally creating a small retinal detachment, which, of course, can cause harm to the photoreceptors.

So we avoid the risks of surgery. Also the distribution of suprachoroidal delivery maybe quite attractive for gene therapy because we're able to potentially expose the retina in the choroid circumferentially and peripherally, which maybe a very attractive way to treat inherited retinal diseases, which often start in the retinal periphery.

So those are the potential advantages of suprachoroidal delivery. And then for the second part of your question with the immune response, and that's really an important key question. That's still being worked out.

There's an increasing body of literature suggesting that it is well-tolerated and that the immune response is not insurmountable that it's overall a fairly favorable immune response.

And I think the fact that REGENXBIO is starting a cohort 3, these are patients who actually have neutralizing antibodies is a very positive sign for suprachoroidal gene therapy. And I just want to remind everybody that they're doing this without any protocol mandated corticosteroid immunosuppressive therapy.

So I think we're still learning a lot about suprachoroidal gene therapy administration. But I think so far so good, especially with respect to some of the news coming from REGENXBIO..

Great. Thank you..

Your next question is from Andreas Argyrides from Wedbush Securities. Your line is open..

Good afternoon. Thanks for taking our questions. This is Andreas on for Liana Moussatos. Congrats guys also on the progress during the quarter. For XIPERE, can you provide an update on the status of the pre-approval manufacturing inspections? And then I have a follow-up after that. Thanks..

Sure. I'll take that. This is George. We're not sure what – how the FDA is going to approach this. We've made our resubmission. Two things that we've done in the resubmission actually was a full NDA resubmission that was responsive to all of the items in the CRL as I mentioned in the prepared remarks.

The most important thing that we had to provide to them was a stability data, three months stability data on our registration batches and we'd done that. Secondly, and more to your question, we had to demonstrate that the procedure that we by which we make the drug product was substantially the same as the previous CMO, and we've done that as well.

So it's really up to the FDA. At this point in time, it's hard to predict how they're going to do any kind of inspection of our new contract manufacturer. They may decide to do an onsite inspection and they may not because of some COVID backup in their shop.

They may take a different approach, but I'm sure they'll let us know once we're engaged in the conversations with the FDA regarding the NDA resubmission. So by now that's up to them, and we don't know exactly what they're going to do in terms of a pre-approval inspection..

Would that be included in the six-month timeline? Or do you think if they were to do an inspection that could push it out?.

Well, they're going to do – if they do an onsite inspection, it's going to be on whatever schedule they have available and how they can fit it into their schedule. But we would anticipate that any inspection, including an onsite inspection would be within that six-month timeframe..

Appreciate that. Thanks. This is probably one for, Tom. So for CLS-AX, anatomic benefit remains the biggest driver of positive outcomes, when do you think you guys will provide imaging of fluid levels at what point? Thanks..

I'm sorry. You broke up the last part of that..

Yes. Apology. So at what point do you think you would show any type of imaging of fluid levels that would give indication of the effectiveness on drying, et cetera? Thanks..

Sure. As I mentioned, the first cohort is really geared towards safety. So we don't expect robust signs of efficacy from this first cohort. In fact, the primary endpoint is really to look at the safety and tolerability, but of course, the secondary endpoints [indiscernible] visual acuity, and some of the anatomic features from OCT and angiography.

Once the final patients or a patient that has completed and reviewed the data, we plan to report data from the first cohort and we expect that would be in the next month. And that will include the safety parameters as well as some of the obviously signs of biologic activity, like visual acuity and some of the OCT and anatomic parameters..

Okay. Thanks for taking my questions and congrats again..

Your next question is from Serge Belanger from Needham & Company. Your line is open..

Hi, good afternoon. Thanks for taking my questions. First one on XIPERE.

So from a Clearside standpoint, what remains outstanding with regards to this collaboration now that you submitted the NDA?.

The collaboration – are you referring the collaboration with Bausch Health?.

Yes..

Yes. Well, we'll be working with them during the review period to plan on success and they'll be working up there hopefully, their launch plans and anticipating that. We'll also – our medical affairs team, our supply chain people are working with their people to make sure the training is all buttoned up and ready to go.

They have a very aggressive training program that they're contemplating. We'll be talking to them about supply chain issues or just working on those with them very cooperatively and we'll deal with any issues that may come up or any questions it came up with the FDA collaboratively.

So once the XIPERE NDA is approved, there'll be a transfer of the NDA to Bausch + Lomb. So that's why we've been very cooperative with them. They've been great to work with and we've worked very cooperatively on the resubmission package and we'll continue to do so through the entire review process..

Okay.

And then on the licensing option for Europe and the UK, is there any timelines associated with them on when Bausch needs to get back to you on the decision there or something that hasn't been – you haven't disclosed?.

Yes. There is a timeline via the end of this summer – the end of August unless for some reason the XIPERE is approved quicker than that. But the decision will have to be – will have to be made before the end of August. And we'll be in – and we'll be talking with Bausch about that.

Beginning or rather shortly, we'll start having those conversations with them now that the NDA has been resubmitted. So again, we anticipate that they're going to be a very good partners but we'll have to talk to them about their plans outside of North America. But that'll be ongoing over the next couple of months..

Okay. And then on – I guess a question for Tom, on CLS-AX.

As you increase the dosing levels here, you talked about durability, so what kind of durability do you think is possible? Could we see something as long as four to six months here? Or I guess just based on your preclinical models, is that something that's possible?.

Thanks for the question. Great question. So we feel that suprachoroidally administered CLS-AX is really attractively differentiated for several reasons, not just durability.

But first of all for safety because we're compartmentalizing the drug in suprachoroidal space, so we don't expect to have particle migration into the vitreous or into the visual axis. So we think there's a potential safety benefit.

Number two, we think the pan-VEGF inhibition aspect of this further differentiates it from other long acting therapies that are really focused on VEGF-A.

This has potential to be more efficacious than current anti-VEGF-A therapies and even long acting anti-VEGF-A therapies because both preclinical and early clinical studies suggest that pan-VEGF inhibition maybe more efficacious with respect to visual acuity and/or drying.

And then third, with respect to durability, we know from our preclinical models that we can have levels in the posterior segment for many months, many months above the IC50 for the VEGF2 receptor, which controls angiogenesis and leakage.

So to answer your question, yes, we think that we can have – there's good potential to have beyond three to four months of durability, but we also may have a very nice safety profile and also potential for enhanced efficacy being a pan-VEGF inhibitor..

Okay. Thanks. Look forward to seeing the data next month..

[Operator Instructions] Your next question is from Jon Wolleben from JMP Securities. Your line is open..

Hey. Thanks for taking the question and congrats on the progress. Just a couple for me. First with CLS-AX with the [sign-off on] going ahead to this 0.1 milligram dose, I'm wondering what else is left before you start dosing the patient? I think you said you're going to wait till July to start dosing.

I wonder if that could happen any sooner and when we could see data from that second cohort?.

Well, thanks for the question. So as I mentioned, once the final patient visits are completed, and we’ll review the data, have it reviewed by the safety monitoring committee, we planned to report data from the first cohort. We expect that to be in June. And then after that, we plan to start enrollment.

So we potentially could have readout for the second cohort six months after that. So I think the investigators have been very eager to recruit. Operationally, the study has gone extremely well. And I also want to remind everybody we've started this trial during the pandemic, during the holiday season and we recruited very robustly.

So as I mentioned, the investigators are very enthusiastic about the program and about recruiting. So we hope to have that data readout from the first cohort in June. And again, it's mostly going to be geared towards safety in the first cohort, but we expect to begin recruitment shortly thereafter for cohort 2..

That’s helpful. And then with the integrin inhibitors, you mentioned, I think that you'd be completing preclinical work this year. But I'm just wondering when you might be publicly discussing those in more detail with any data.

And then if you've characterized which integrins are going after? And then how you think about the opportunity there? And I think you said DME or DR versus expanding CLS-AX into those indications..

I'll take the latter two questions and let George discuss disclosure. But we adopted this integrin inhibitor that targets integrins alpha v beta 3, alpha v beta 5 and alpha 5 beta 1. And these are the key integrins that have been implicated in diabetic macular edema, diabetic retinopathy in AMD.

As you know, there's been preclinical and early clinical data suggesting a role for integrin inhibitors in these large disorders. So we're currently formulating our integrin inhibitors as a small molecule suspension. We're doing further preclinical testing to assess the ocular tolerability distribution in pharmacokinetics.

And we hope to share that sometime this year. In terms of portfolio planning, I'll defer that to George in terms of how it fits in with CLS-AX..

Well, Jon, I think, you never can have enough shots on goal. And so we think that we have an opportunity with integrin to have another shot on major retinal diseases, take your point that you could consider something like a CLS-AX to go after some of those similar diseases.

But we're looking at different – we're trying to diversify our pipeline based on mechanism of action as well as anything else. And we just think there's – it makes perfect sense to us to be able to formulate integrin as a small molecule.

It's our sweet spot in research and development or small molecule suspensions of molecules that are relatively insoluble. And so it's another opportunity for us. And when we're talking about these kinds of indications now that doesn't mean that's where we're going to end up.

Tom and I have constant discussions about other potential applications for both of these products, both CLS-AX, and integrin. So this is where we're initially looking, but it may not be where we end up. And so we have some pretty robust discussions about that in the company.

And as Tom mentioned, in terms of the preclinical data, we're hoping to have some preclinical data to be able to disclose before year-end on the integrin..

Perfect. Looking forward to it. Thanks again for taking the questions..

Sure. Thank you..

I'm showing no further question at this time. I would like to turn the conference back to CEO, Mr. George Lasezkay for closing remarks..

Thanks. Well, thank all of you for joining us on the call this afternoon. We really appreciate your continued interest in Clearside and what we are doing, and we look forward to updating you on our progress throughout the rest of the year. Operator, now you may disconnect the call. And thanks again for everybody participating..

Ladies and gentlemen, this concludes today's conference call. Thank you for your participation and have a wonderful day..